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Summing perturbation expansions by means of renormalization group considerations

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Czechoslovak Journal of Physics Aims and scope

Abstract

Renormalization group considerations are used to sum divergent perturbation expansions encountered in QCD or other quantum field theories. The method works even in the case when these expansions, considered in a fixed renormalization scheme (RS), are factorially divergent and of asymptotically constant sign. The results assume the form of convergent (under certain circumstances) expansions in a set of functions of a free parameterχ which specifies the procedure involved. It is argued that the relation of our results to conventional, formal perturbation expansions in a fixed RS in fact suggests the physical interpretation of this parameter and specifies its value.

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Authors and Affiliations

  1. Institute of Physics, Czechosl. Acad. Sci., Na Slovance 2, 180 40, Prague 8, Czechoslovakia

    J. Chýla

  2. Joint Institute for Nuclear Research, Laboratory of Theoretical Physics, Dubna, USSR

    Č. Burdík

Authors
  1. J. Chýla
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  2. Č. Burdík
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Chýla, J., Burdík, Č. Summing perturbation expansions by means of renormalization group considerations. Czech J Phys 40, 367–392 (1990). https://doi.org/10.1007/BF01597912

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  • DOI: https://doi.org/10.1007/BF01597912

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